Grundfos

Stainless steel manual sump pump, max flow rate 2.3l/sec and max head 5m, 1 1/4" threaded connections and 10mm solids handling

The Grundfos Unilift KP 250-M1 drainage pump is engineered to deliver reliable performance across a wide range of dewatering and water transfer applications. It is well suited to sump and cellar drainage, emptying tanks and swimming pools, and handling general domestic and light commercial duties where dependable operation is essential.

Built to a high specification, the pump incorporates durable Stainless Steel components to support long service life and consistent performance. Single-phase versions are equipped with an integrated automatic thermal overload protection device, safeguarding the motor against overheating in the event of dry running.

The wet rotor configuration allows the unit to tolerate short periods of dry operation without damage. An open impeller design featuring sling and bevelled-edge vanes helps minimise the risk of blockage by fibres and debris, ensuring smooth and efficient pumping in demanding conditions.

The Home Booster unit incorporates an integrated 200 litre storage tank, providing a usable capacity of 180 litres and complete with a Type AB air gap in full compliance with Water Byelaws regulations. This design ensures secure separation from the mains supply while maintaining a reliable and protected water reserve.

A high-grade Stainless Steel pump is fitted as standard, delivering efficient performance, consistent pressure, extended service life and low-noise operation. For properties with increased demand, or where incoming mains pressure results in slow tank replenishment, an additional 180 litre slave storage tank can be specified to expand overall capacity and improve system resilience.

Supplied with a 2 Year Warranty.

Grundfos (est. 1945) is a Danish pump manufacturer known for high-efficiency circulators, multistage boosters, borehole and wastewater pumps, plus packaged pressure systems. The range covers HVAC circulation, domestic hot water recirculation, pressure boosting, industrial water transfer and public water management, with strong focus on energy efficiency and intelligent controls.

UNILIFT AP35B.50.06.1V
Submersible effluent pump unit

Vertical single-stage Stainless Steel submersible pump with integrated submersible 1-phase motor.

The pump is equipped with ring stand and carrying handle and is supplied with a 10 m mains cable.

The impeller is a VORTEX impeller for 35 mm free passage appropriate for pumping surface water, groundwater, wastewater and similar.

The pump has a double shaft seal and an intermediate oil chamber pre-filled with non-toxic special oil.

The motor is insulation class F with thermal overload protection and has long-life deep-groove greased-for-life ball bearings.

The pump has Rp 2 inch discharge port and is ready for installation either free-standing or on an auto-coupling assembly.

Suitable for: Commercial wastewater, Domestic wastewater

UNILIFT AP50B.50.08.1V
Submersible effluent pump unit

Vertical single-stage Stainless Steel submersible pump with integrated submersible 1-phase motor.

The pump is equipped with ring stand and carrying handle and is supplied with a 10 m mains cable.

The impeller is a VORTEX impeller for 50 mm free passage appropriate for pumping surface water, groundwater, wastewater and similar.

The pump has a double shaft seal and an intermediate oil chamber pre-filled with non-toxic special oil.

The motor is insulation class F with thermal overload protection and has long-life deep-groove greased-for-life ball bearings.

The pump has Rp 2 inch discharge port and is ready for installation either free-standing or on an auto-coupling assembly.

Suitable for: Commercial wastewater, Domestic wastewater

UNILIFT AP50B.50.11.1V
Submersible effluent pump unit

Vertical single-stage Stainless Steel submersible pump with integrated submersible 1-phase motor.

The pump is equipped with ring stand and carrying handle and is supplied with a 10 m mains cable.

The impeller is a VORTEX impeller for 50 mm free passage appropriate for pumping surface water, groundwater, wastewater and similar.

The pump has a double shaft seal and an intermediate oil chamber pre-filled with non-toxic special oil.

The motor is insulation class F with thermal overload protection and has long-life deep-groove greased-for-life ball bearings.

The pump has Rp 2 inch discharge port and is ready for installation either free-standing or on an auto-coupling assembly.

Suitable for: Commercial wastewater, Domestic wastewater